LOINC description : Field for pre-1996 surgery codes for COC and pre-1998 surgery codes for SEER. Surgery
codes used 1998 and later can be backward converted into the older codes and the converted
value can be stored in this field. See Chapter V, Unresolved Issues, for discussion
of COC/SEER differences in coding treatment... NAACCR Data Standards and Data Dictionary
Version 11;